Scroll down, then up

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.

The bar gets a shadow as soon as the page leaves the top, slides away after 150 px of scrolling down, and comes back after 150 px of scrolling up.